In Huygen’s eyepiece

a) |
The cross wires are outside the eyepiece |

b) |
Condition for achromatism is satisfied |

c) |
Condition for minimum spherical aberration is not satisfied |

d) |
The image formed by the objective is a virtual image |

In Huygen’s eyepiece

a) |
The cross wires are outside the eyepiece |

b) |
Condition for achromatism is satisfied |

c) |
Condition for minimum spherical aberration is not satisfied |

d) |
The image formed by the objective is a virtual image |

1 Answer

127 votes

Huygen eyepiece satisfies the conditions for elimination of the chromatic aberration as well as spherical aberration. |

127 votes

127